Walter -eeeustbom



W. REENSTROIVI.

VENTILATQR. APPLICATION FILED MAY 31, I917- Patented A110. 8, 1922?.

Injren 5602* alierfieen mu m in eawem WALTER REENSTROM, OF CHICAGO,ILLINOIS.

VENTILATOR.

To all whom it may concern:

Be it known that'I, lVALTnR REENSTROM, a citizen of the United States,and a resident of the city of Chicago, county: of Cook, and State ofIllinois, have invented certain new and us efullmprovements inVentilators, of

V which the following is a specification.

My invention relates to improvements in ventilators designed for useparticularly upon house tops, and has for itsobject the production .of adevice of this character which will be efficient in use and of durableand economical construction. A further object is the production of aprocess of manufacture of a ventilator as mentioned whereby the same maybe manufactured easily and economically, waste of material being reducedto a minimum. Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of partshereinafter described and claimed.

The invention will be best understood by reference to the accompanyingdrawings forming a part of this specification, and in which,

Fig. 1 is a side elevation of a ventilator embodying the invention,

Fig. 2, a central vertical section of the device, 2

Fig. 3, a top plan view of Fig. 1,

Fig. 4, a horizontal section through the device, and

Fig. 5, a top plan view of a sheet metal blank illustrating the methodof cutting of the same in the formation of the hood and aprons embodiedin the ventilator.

The preferred form of construction as illustrated in the drawings,comprises an outer tubular member consisting of a plurality oftelescoping tubular sections 5. Said sections are rigidly connected attheir points of overlapping by rivets 6. Arranged within said tubularmember is a plurality of spaced longitudinally extending reinforcingbars or straps 7 which are rigidly connected with the sections' 5 by thebefore-mentioned rivets 6. The upper end portions of bars 7 are rigidlyconnected with the upper edge portion of the uppermost section 5 byrivets 6.

Arranged at and spaced directly over the upper end of said tubularmember is a conical hood 8, the samebeing supported by the upper ends ofbars 7 which are extended upwardly in order to constitute supportsSpecification of Letters Patent. Patent d A 8 1922 Application filed May31, 19 7;] Serial No. 172,016.

edgeportions ofsaid ho'odsections are rigidly secured together. byrivets 9.

.60 clearly seen in F ig- .3. Said overlapping' Arranged at the upperedge of each section 5 is an annular ,downwardly'and outwardly inclinedapron 10 secured to said sections by means of the rivets 6 and 6.Openings 11 are formed at the upper ends of each section 5 below theaprons 10 through notching or cutting away the upper edge portions ofsaid sections, as clearly seen in Fig. 2. The openings 11 do not extendbelow the lower edges of the aprons 10, this arrangement precluding adirect draft into sald openings which would otherwise result, did saidopenings extend below the lower edges of said aprons.

In the manufacture of the hood 8 and aprons 10, a rectangular fiat blankof sheet metal is employed as seen in Fig. 5. Said blank is out alongtwo spaced concentric lines 12 and 13, one-half of the hood being formedby the semi-circular portion within the line 12, and one-half of one ofthe aprons 10 being formed by the arcuate strip 10 between the lines 12and 13. With this process or method of construction, only the cornerportions 14 will be wasted. Concentricallv arranged within the tubularmember 5 of the ventilator is a smaller ipe l5 rigidlv held in positionby means of arms 16. The upper end of pipe 15 is closed andprovided withlateral openings 17. Said openings 17 are preferably arranged insubstantially the same horizontal plane as the lowermost openings 11.The tubular pipe surrounding the pipe 15 is prolonged at the lower endso as to allow both it and the pipe 15 to pass into and communicate withthe interior of the building with which the device is used,

Q a 1,424,94a v my invention into effect, this is capable of variationand modification Without departing from the spirit of the invention; 1,;

therefore do not Wish to be limited to the precise details ofconstruction set forth, but desire to avail myself of such variationsand modifications as come Withinthe scope of the a'ppendedclaim.

Having described my invention 'What I claim as new and desire to secureby Letters Patient is:" I

In'a ventilator, the combination With a plurality of telescopingsections having their adjoining edge portions overlapping andsecuredtogether longitudinally extending reinforcing bars connected to saidsections,

the vupperportions of said bars being eX- tended beyond the upper edgeofthe upper section of said ventilator; a hood carried by and secured tosaid bars in spaced relation With respect to the said upper section;anguvlar downwardly and outwardly inclining aprons carried by andsecuredito the upper edge ofeacli of said sections, and openings formedat the upper ends of each of said sections, substantially as described.

In testimon'y whereof I have signed my name to this specification in the1316861106'015 two subscriblng itnesses.

